Simulation of Crab Waist Collisions In DA{\Phi}NE With KLOE-2 Interaction Region

TL;DR

This paper simulates crab waist collision effects in DAΦNE collider, analyzing beam-beam interactions, dynamical aperture, and proposing optimizations to enhance luminosity with the KLOE-2 detector.

Contribution

It provides a detailed simulation of crab waist collisions in DAΦNE considering real lattice complexities and suggests specific operational improvements for luminosity enhancement.

Findings

Crab waist sextupoles influence the dynamical aperture and energy acceptance.

Optimizing working point and sextupole strength significantly increases performance.

Implementation of proposed changes led to notable luminosity improvements.

Abstract

After the successful completion of the SIDDHARTA experiment run with crab waist collisions, the electron- positron collider DA{\Phi}NE has started routine operations for the KLOE-2 detector. The new interaction region also exploits the crab waist collision scheme, but features certain complications including the experimental detector solenoid, compensating anti-solenoids, and tilted quadrupole magnets. We have performed simulations of the beam-beam collisions in the collider taking into account the real DA{\Phi}NE nonlinear lattice. In particular, we have evaluated the effect of crab waist sextupoles and beam-beam interactions on the DA{\Phi}NE dynamical aperture and energy acceptance, and estimated the luminosity that can be potentially achieved with and without crab waist sextupoles in the present working conditions. A numerical analysis has been performed in order to propose possible steps for further luminosity increase in DA{\Phi}NE such as a better working point choice, crab sextupole strength optimization, correction of the phase advance between the sextupoles and the interaction region. The proposed change of the e- ring working point was implemented and resulted in a significant performance increase.